The Sierra 18-43015 Thermostat is designed to regulate engine operating temperature by controlling cooling-water flow in Mercruiser applications. It replaces Mercruiser 864493.
Fits:Â MCM 4.3L, 5.0L, 5.7L & 6.2L MPI engines w/dry joint exhaust & closed cooling
Temperature Rating: 170°F (77°C)
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-43015?
Sierra 18-43015 is an aftermarket thermostat for Mercruiser applications.
Which part numbers cross-reference Sierra 18-43015?
This listing cross-references Mallory 9-43015 and Mercruiser 864493. See the Cross References & Alternative Products section above for linked alternatives where available.
How can I check whether Sierra 18-43015 fits my Mercruiser application?
Contact us with your engine model and serial number and we'll help check suitability.
Australian Dollars
